This is ransomware﻿, which is a type of malware that prevents users' access to personal files until a ransom payment is made. In this case, Jack's customer data has been encrypted, and he must pay a $500 ransom in order to get it back.

Jack paid the ransom and got his data back, ﻿but he was extremely upset and wanted to learn how to prevent another future ransomware attack.

﻿He found many ways to prevent ransomware, and now he feels protected from all the dangers of malware!